Citation: Pin Cui, Ying Tang, Jie Yu, Zhen Yang, Shouhua Yang, Boqin Li, Gang Wang, Huan Pang, Feng Yu. Bimetallic ZnFe–NC prepared using microchannel reactor for oxygen reduction reaction and mechanism research[J]. Chinese Chemical Letters, ;2025, 36(9): 110303. doi: 10.1016/j.cclet.2024.110303 shu

Bimetallic ZnFe–NC prepared using microchannel reactor for oxygen reduction reaction and mechanism research

Pin Cui ^{a, 1} ,
Ying Tang ^{a, 1} ,
Jie Yu ^{b, 1} ,
Zhen Yang ^a ,
Shouhua Yang ^a ,
Boqin Li ^a ,
Gang Wang ^a ,
Huan Pang ^{c, *,} ,
Feng Yu ^{a, d, *,}

a.
Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China
b.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
c.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, China
d.
Carbon Neutralization and Environmental Catalytic Technology Laboratory, Bingtuan Industrial Technology Research Institute, Shihezi University, Shihezi 832003, China

panghuan@yzu.edu.cn

yufeng05@mail.ipc.ac.cn

Received Date: 8 May 2024
Revised Date: 8 July 2024
Accepted Date: 30 July 2024
Available Online: 31 July 2024

Figures(4)

An Fe-doped bimetallic ZnFe–MOF precursor was prepared using a microchannel reactor, and carbonization was conducted to synthesize a bimetallic catalyst (ZnFe–NC). The fundamental reason for the efficient activity of the catalyst was determined through an in-depth analysis of its structural composition and close correlation with the oxygen reduction reaction (ORR). The ZnFe–NC catalyst maintains a stable truncated rhombohedral morphology and a rich microporous structure, exhibiting excellent ORR activity and long-term stability. The experimental results show that compared with the reversible hydrogen electrode, it has a high half-wave potential of 0.902 V (E_1/2), retains 94% of activity after 35,000 s of stability testing, and exhibits significant methanol tolerance in alkaline media. Density functional theory calculations confirm the synergistic effect between the Zn and Fe sites. Furthermore, the results indicate that the interaction between ZnFe–N₆ coordination structures reduces the reaction energy barrier, thus enhancing intermediate adsorption during the ORR.
- Metal organic frameworks,
- Microchannel reactor,
- ZnFe–NC,
- ORR,
- Reaction mechanism
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